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-rw-r--r--microblaze_config.mk2
1 files changed, 2 insertions, 0 deletions
diff --git a/microblaze_config.mk b/microblaze_config.mk
index cd7548c..b3ac8e0 100644
--- a/microblaze_config.mk
+++ b/microblaze_config.mk
@@ -22,6 +22,8 @@
# MA 02111-1307 USA
#
+PLATFORM_CPPFLAGS += -ffixed-r31
+
ifdef CONFIG_MICROBLAZE_HARD_MULT
PLATFORM_CPPFLAGS += -mno-xl-soft-mul
endif